Vaisala AWS310-SITE, Configuration And Maintenance Manual

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4.11.20 LLWAS Report
The LLWAS report gives different data about wind speed and wind direction.
LLWAS Report Format
$PidWV,xxx,R,yy.y,M,z*12<CR><LF><SOH>STA<STX> xx.x y zz.z a<ETX><CR><LF>
Table 14 LLWAS Report, Wind Section
Name Description
$PidMWV
The message header, where where id is the station ID.
xxx,R,yy.y,M,z
Message data:
• xxx = Wind direction (deg), 3
‑
second weighted average
• R = Relative direction
•
yy.y
= Wind speed (m/s), 3
‑
second weighted average
•
M
= Speed unit
•
z
= Measurement status, where
A
= valid and
V
= invalid
*12
Message checksum:
•
*
= Checksum indicator
•
12
= Checksum<8bit XOR %02d>
• Checksum span = Between $ and * , with them being excluded
<CR><LF>
Message trailer
Table 15 LLWAS Report, Status Section
Name Description
<SOH>STid<STX>
The message header, where id is the station ID.
xx.x y zz.z a
Message data:
• xx.x = External power voltage (V), instant value
• y = Low battery alarm
• zz.z = Data logger internal temperature (°C), instant value
• a = Door closed ( 0 ) / open ( 1 )
<ETX><CR><LF>
Message trailer
LLWAS Report Characteristics
The system does not send the LLWAS report automatically.
Property Value
Polling command
WIND<CR>
AWS310-SITE Configuration and Maintenance Manual M211828EN-C
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